Disintegrating-mill.



No. 650,568. Patented May 29, I900.

A. J. SAGKETT. DISINTEGBATING MILL.

(Apylication filed my 31, 1899.) (No Model.) 3 $hoatsSheet I.

WITNESSES I INVENTDR I .JlV/M:

. v ATTORNEYS.

No. 650,568. Patented May 29, I900. A. .1. SACKETT.

DISINTEGRATING MILL.

(Application filed May 31, 1899.)

3 Sheets-Sheet 2.

(No Model.)

FIG. 2.

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UNITED STATES PATENT OFFICE.

AUGUST 3. SACKETT, OF BALTIMORE, MARYLAND.

DISINTEGRATING-MILL.

I SPECIFICATION forming part of Letters Patent No. 650,568, dated May 29, 1900. Application filed May 31, 1899. Serial No- 718,806. (No model.)

To all whom it may concern:

Be it known that I, AU GUST J. SACKETT, of the city of Baltimore, in the State of lllaryland, have invented certain Improvements in Disintegrating-lllills, of which the following is a specification.

This invention relates to certain improvements in a mill for the disintegration of phosphate-rock and other hard substances, as will hereinafter fully appear.

In the description of the said invention .which follows reference is made to the accompanying drawings, forming a part hereof, in which- Figure 1 is a top view of the improved disintegrating-mill with a part of the casing or shell thereof torn away to show the interior. Fig. 2 is a section of Fig. 1, taken on the dotted line m a. Fig. 3 is a section of Fig. 1, taken on the dotted line 3 y. Figs. 4, 5, and 6 are detached views of parts of the mill and hereinafter referred to.

Referring now to the drawings, A A are sills upon which the mill is erected, and B is the casing or shell, secured to the sills.

C is the beater-shaft, which passes through the casing or shell in a lateral direction and is supported exteriorly of the casing by pillow-blocks D. These pillow-blocks, a face view of one of which is shown in Fig. 4, stand onand are secured to brackets a, projecting from the casing B, and consist each in a box b in one piece, as shown in the drawings, or in two halves, as may be desired, a pivotal support 61 for the box b, and a holding-down frame e, hereinafter more particularly described. stud inserted in a hole in the bracket a,having a hemispherical head which enters a similarly-shaped depression in the under side of the box. The upper surface of the said box has a hemispherical projection f similar to the head of the stud just described, which enters a hemispherical depression gin a boss h, formed as a part of the holding-down frame e. The construction of the pillow-blocks as described admits of the boxes which do not fit closely against the inner sides of the frames The pivotal support d consists of a mills,where the boxes are fixed and somewhat out of alinement.

In order that the lug hand the hemispherical head d of the stud may be set the proper distance apart without accurate fitting up of the frame, the frame is made shorter than is necessary and the space between it and the top of the bracket provided with a wood liner of the requisite thickness, as is common in machinery construction. v

E is the rotary disintegrating device, 'C011- sisting of a hub or central disk j, keyed on the shaft 0, having heaters 70 bolted in pockets formed in the disk. These heaters extend from the disk in a direction which is oblique with reference to a radial line in order that when the position of the rotary device is changed by turning the shaft end for end the beaters will occupy a reversed position with regard to any cutting or grinding surfaces with which they may be made to cooperate in the grinding operation. In other words, supposing the boaters to be rotating in the direction indicated by the curved arrow in Fig. 3, the heaters, as shown in the drawings, will be inclined in advance of radial lines; but if the position of the shaft is reversed they will fall back of radial lines. The cutting and grinding devices with which the beaters cooperate will be hereinafter described.

The casing or shell of the mill is constructed substantially the same as that shown and described in my application, Serial No. 711,210, for a disintegrating-mill, filed March 31, 1899, and it therefore forms no part of the present invention. It is provided with central and side feed-openings, (respectively denoted by Gand H,) having removable doors m,whereby 0 the materials to be ground may be introduced into the casing from either side or from the top, and also with a hinged deflector K, whereby the 'materials introduced through either feed-opening may be delivered to either side 5 of the heaters, as described in the said application, and this device, as well as the arrangement of the feed-doors, forms no part of the present invention.

I I are hinged pendent plates situated in the feed end of the casing, the upper portion of which is inclined, as shown in Fig. 2. The

lower portion of each of these plates is segmental in shape (see Fig. 3) and the inner surface is vertical and bounded at the outer edge by a flange Z.

J J are segmental disintegratingplates which rest on the flange l and are'secured to the plates I. (See Fig. 3.) The disintegrating-plates J may have any character of dress or disintegrating-surface adapted to the peculiar character of the materials to be ground; but I have shown such surface as consisting of ribs 12, whose angle with reference to radial lines is about the same as that of the heaters 70. These ribs are placed closer together at the lower than at the upper portion of the plates in order that the resistance offered to the passage of the materials will be increased as they advance.

L L are fixed inclined ribbed plates of substantially the same construction as those shown in the said application, and they therefore form no part of the present invention. Their ollice is to carry the materials over the hinged ends of the hinged plates, and the ribbed surface prevents lateral scattering of the materials in their downward passage.

The pendent plates I are arranged to be yielding for the same purpose as that described in the said application-that is to say, to prevent their being injured byunbreakable bodies conducted with the materials to be ground between them and the beatersbut the means for effecting the result are different, and consist as follows: Each complete device for the said purpose consists of a threaded bar N, jointed to its plate I and extending through a hole in the casing and also through a bracket Q, projecting from the casing and fitted with a nut at its end. Screwed through the medium of a wrench.

upon the threaded bar N is an open-end threaded sleeve 0, which passes loosely through the casing and is provided with a hexagonal flange q, whereby it may be turned Within the said sleeve and coiled about the threaded bar N is a spring P, which is confined endwise between the threaded portion of the s1eeve,which answers the purpose of a nut,and the said bracket, which is recessed to receive it. By this construction the resistance of the plates I, carrying the disintegrating-plates, to outward movement may be increased or diminished by turning the threaded sleeve, as will be readily understood.

In order to avoid complication in the drawings, the plates I are shown as provided each with only one of these spring sustaining devices; but in practice two or more are applied to each plate and in such positions that the plates are properly and equally supported at all points.

R is a segmental grated disintegratingshoe consisting of the central bar 7' and the cross-bars s, the upper edges of which are inclined, as shown in Fig. 3, to form disintegrating-teeth. This segmental shoe is held yieldingly in close proximity to the edges of the segmental portions of the disintegratingplates and just clear of the path described by the ends of the heaters.

The means for holding the upper ends of the shoe yieldingly in the position described consist of a bar S, hinged to a lug V, projecting from the upper end of the shoe, which passes through a bracket T, bolted to the easing B, having a tension-adjusting nut at its end and a coiled spring U, confined endwise between the fixed and loose collars t and a, respectively, formed on the said bar. (See Fig. 3.) The lower end of the shoe is supported so as to yield in case it is subjected to an extraordinary outward strain in the grinding operation by a rod a which extends through it and through slots 1) in the sides of the casing, (see particularlyFigs. 2and 6,) the latter being a detached view of certain of the parts alluded to. The rod a where it passes through the slots 1) is provided with a roller (1. to reduce friction and give a better Wearing-surface. (See Fig. 6.) The ends of the rod a rest loosely in eyed bolts 0 which extend upward through slotted brackets d bolted to the casing, (see Fig. 6,) and have nuts e at their ends. Spiral springs f are confined between the said brackets and the nuts, and the tension of the springs is regulated by turning the nuts.

The office of the grated disintegrating-shoe just described is to cotiperate with the ends of the heaters k, so as to further grind materials which shall have passedthedisintegrau lug-plates. Any material which is not sufliciently reduced to escape through the spaces between the transverse bars of the-shoe is carried around by the boaters-and falls to the upper end of the disintegrating-plates and is reground. The portions of the disintegrating-plates K situated between the ribs 1), and also the pendent plates at points coincident with them, are perforated to admit of the escape of materials which shall have been reduced to the proper size before reaching the shoe. (See Fig. 3.) Y

The mill is provided with a guard A which corresponds in construction with the one shown in the said application to prevent pieces of the materials to be ground becoming jammed between the ends of the-beaters and the casing.

When the rotary disintegrator is placed in the mill so that its boaters are placed with reference to the ribs of the disintegrating plates as shown in the drawings, the major portion of the disintegrating process is accomplished before the materials reach the shoe for the reason that the materials are checked in their descent of the disintegratingsurfaces of the plates by the converging of the boaters and ribs; but when the position of the heaters is reversed, so that they bear the same relation to radial lines as the ribs, the descent of the materials is not checked to the same extent, and they pass more readily to the shoe, where the grinding is completed by the cooperative action of the ends of the, heaters and the toothed surface of the shoe. The mill is thus adapted for a rapid or a more gradual reduction of materials.

It will be seen that all the disintegratingsurfaces with which the heaters cooperate are yielding, and hence there is little danger of injury to the mill by the introduction thereto with the materials to be ground of practicallyunbreakahle substances.

I claim as my invention- 1. In a disintegrating-mill, the combination of a casing, a rotary shaft extending laterally through the casing, carrying heaters, disintegrating-plates between which the beat-' ers pass, and a curved grated shoe which consists of a central bar yieldingly and independently suspended at its ends and a system of separated cross-bars the inner edges of which are at less than a right angle with radial lines extending from the center of the rotary shaft, whereby they constitute teeth which are opposed to the ends of the rotary boaters, substantially as shown, the said shoe serving to practically close the space between the said disintegrating-plates, substantially as specified.

2. In a disintegrating-mill, the combination of a casing, rotary heaters situated within the casing, disintegrating plates between which the heaters pass, the said disintegrating-plates having the form of asegment of a circle with their inner edge practically concentric With the path of the heaters, a grated shoe in a single piece having a toothedinner disintegrating-surface which, when the shoe is in its normal position, is in close proximity to the path described by the ends of the beaters, and spring devices applied independently to the ends of the shoe to hold it yieldingly in the said normal position with reference to the heaters, substantially as specified. I

AUGUST J. SAOKETT.

\Vitnesses:

.WM. T. HOWARD,

HARRY E. FEE. 

